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Justifer loves New York!

An upbeat Jennifer Aniston and Justin Theroux braved the humidity and dreary grey skies in Manhattan on Thursday. The casually dressed couple grinned as they took a stroll downtown. Aniston, 42, recently purchased two apartments in NYC's Greenwich Village for a total of $7.7 million, with elaborate renovation plans; conveniently, 39-year-old Theroux's pad, which he shared with longtime love Heidi Bivens up until a few weeks ago, is close by.

L.A. girl Aniston is evidently savoring downtown life with scruffy hunk Theroux, 39, whose hipster cred includes membership in a motorcycle club called Die Fast and a wardrobe of grungy tees and combat boots.

"Jen's supremely impressed by his humor," a source tells Us Weekly of the hot-and-heavy couple, whose romance secretly began on the set of Wanderlust last fall.

And now that Theroux is officially unattached (after 14 years together, he finally ended things with Bivens, 35, in March) and they've gone public with their romance, Aniston "only wants to be with Justin right now," the source says.

Read more about Aniston's big time new love in this week's Us Weekly.